Generally, almost 65% of the total calorie intake should be acquired from carbohydrates according to the standard nutritional guidelines. Proteins represent a very small portion in the ideal balanced diet while fat represents almost one-third of the total caloric content. MORE Â».
The trench is then backfilled, and additional material added to the top. Both of the Baltimore tunnels (the Harbor Tunnel and Fort McHenry Tunnel) used this method in their construction. The Harbor Tunnel, built in the mid-1950s, was considered an engineering marvel.
In 1985, the eight-lane Fort McHenry Tunnel became a vital part of I-95, the East Coast's most important interstate route. The Tunnel crosses under the Patapsco River south of Fort McHenry, and connects the Locust Point and Canton areas of Baltimore City. Tolls of $4.00 each way for cars (higher for vehicles with 3 or more axles) are collected for both tunnels, and electronic toll-collection (known as M-TAG) began for both in 1999.